<html><body><div style="color:#000; background-color:#fff; font-family:tahoma, new york, times, serif;font-size:12pt"><div style="RIGHT: auto"><SPAN style="RIGHT: auto">Hi James,</SPAN></div>
<div style="FONT-SIZE: 16px; FONT-FAMILY: tahoma, new york, times, serif; RIGHT: auto; COLOR: rgb(0,0,0); FONT-STYLE: normal; BACKGROUND-COLOR: transparent"><SPAN style="RIGHT: auto">I always do a vacuum test before my test dives. I use a compressor as a vacuum pump and draw out as much air as possible. Then I have a valve on the hull and a vacuum gauge. I let it sit for 24 hr. If it holds the vacuum your set. </SPAN></div>
<div style="FONT-SIZE: 16px; FONT-FAMILY: tahoma, new york, times, serif; RIGHT: auto; COLOR: rgb(0,0,0); FONT-STYLE: normal; BACKGROUND-COLOR: transparent"><SPAN style="RIGHT: auto">Hank<VAR id=yui-ie-cursor></VAR></SPAN></div>
<div style="RIGHT: auto"><BR style="RIGHT: auto"></div>
<DIV style="FONT-SIZE: 12pt; FONT-FAMILY: tahoma, new york, times, serif">
<DIV style="FONT-SIZE: 12pt; FONT-FAMILY: times new roman, new york, times, serif">
<DIV dir=ltr>
<DIV class=hr style="FONT-SIZE: 0px; BORDER-TOP: #ccc 1px solid; HEIGHT: 0px; BORDER-RIGHT: #ccc 1px solid; BORDER-BOTTOM: #ccc 1px solid; PADDING-BOTTOM: 0px; PADDING-TOP: 0px; PADDING-LEFT: 0px; MARGIN: 5px 0px; BORDER-LEFT: #ccc 1px solid; LINE-HEIGHT: 0; PADDING-RIGHT: 0px" readonly="true" contenteditable="false"></DIV><FONT size=2 face=Arial><B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B> James Frankland <jamesf@guernseysubmarine.com><BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> personal_submersibles@psubs.org <BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Monday, September 2, 2013 3:45:27 AM<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> [PSUBS-MAILIST] Leak, pressure and life support test<BR></FONT></DIV>
<DIV class=y_msg_container style="RIGHT: auto"><BR>
<DIV id=yiv1016670701 style="RIGHT: auto">
<DIV>Hi All,</DIV>
<DIV> </DIV>
<DIV>I did some tests at the weekend. Very small pics attached as i havent updated my site yet.</DIV>
<DIV style="RIGHT: auto"> </DIV>
<DIV style="RIGHT: auto">First i tested the battery pods and seals with old inner tubes. Managed to pump them to about 5psi. Not much but i think it was ok to indicate any leaks. I couldnt see or hear anything and pressure remained steady.</DIV>
<DIV> </DIV>
<DIV>Then i did the very sophisticated "saucepan test" over the hatch viewport. I was just a bit suspicious of this one as it has no gasket, the lense seats directly to the face. No leak, but agreed, not much test pressure although the saucepan was full despite the spillage out the sides.</DIV>
<DIV> </DIV>
<DIV>Next i did a life support test. I filled and ran the scrubber and then sat inside for an hour with the hatch sealed. CO2 seemed to level out at about 5500ppm and i topped up O2 when it got to 19%. </DIV>
<DIV> </DIV>
<DIV>i also dropped half a psi of internal pressure and that seemed to hold, so i am hoping the boat is tight.</DIV>
<DIV> </DIV>
<DIV>I was going to do a leak test in a local fresh water resovoir, but as im a bit more confident its not going to leak now and its such a logistical fuss, im going to go straight in the sea. Next week.</DIV>
<DIV>Kind Regards</DIV>
<DIV>James</DIV>
<DIV> </DIV></DIV><BR>_______________________________________________<BR>Personal_Submersibles mailing list<BR><A href="mailto:Personal_Submersibles@psubs.org" ymailto="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</A><BR><A href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target=_blank>http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</A><BR><BR><BR></DIV></DIV></DIV></div></body></html>